Wavetek 132 Spezifikationen PDF herunterladen (Seite 68)

WAVETEK186

VCA

N

OFT

6A

oc

OP

WAVETEK132

OUT

Ö

TRIG

t

Figure

1

d)

Channel

B

is

now

a

conventional

AM

signal.

Adjust

the

attenuation

variable

knob

on

the

186

to

produce

AM

signals

that

are

100%,

<100%

and

>

100%

modulated.

The

modulation

index

can

be

determined

from:

%

m

-

k

xlOO

=

max

"

***

xlOO

A

+

A

.

max

mm

Print

a

plot

of

the

100%

modulated

wave.

Q:

Compute

and

draw

the

spectra

of

the

square

wave

input

and

the

AM

wave.

Include

the

time

and

frequency

representations

of

each.

Using

the

RAPIDS

spectrum

analyzer,

print

the

spectra

of

both

channels

to

verify

your

results.

Configure

the

spectrum

analyzer

as

follows:

INPUT

VOLTAGE:

8.0

Vpp

TRANSLAT

FREQ:

0.0

kHz

WINDOW

TYPE:

Rectangular

TRIGGER

TYPE:

Normal

Lab

3

Page

3

58

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